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105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
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/* Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#ifndef _SYS_CDEFS_H
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#define _SYS_CDEFS_H 1
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#include <features.h>
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/* Some user header file might have defined this before. */
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#undef __P
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#ifdef __GNUC__
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#define __P(args) args /* GCC can always grok prototypes. */
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#define __DOTS , ...
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#else /* Not GCC. */
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#define __inline /* No inline functions. */
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#if (defined (__STDC__) && __STDC__) || defined (__cplusplus)
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#define __P(args) args
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#define __const const
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#define __signed signed
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#define __volatile volatile
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#define __DOTS , ...
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#else /* Not ANSI C or C++. */
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#define __P(args) () /* No prototypes. */
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#define __const /* No ANSI C keywords. */
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#define __signed
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#define __volatile
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#define __DOTS
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#endif /* ANSI C or C++. */
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#endif /* GCC. */
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/* For these things, GCC behaves the ANSI way normally,
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and the non-ANSI way under -traditional. */
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#if defined (__STDC__) && __STDC__
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#define __CONCAT(x,y) x ## y
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#define __STRING(x) #x
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/* This is not a typedef so `const __ptr_t' does the right thing. */
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#define __ptr_t void *
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typedef long double __long_double_t;
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#else
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#define __CONCAT(x,y) x/**/y
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#define __STRING(x) "x"
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#define __ptr_t char *
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typedef double __long_double_t;
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#endif
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/* The BSD header files use the ANSI keywords unmodified. (This means that
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old programs may lose if they use the new keywords as identifiers.) We
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define them to their __ versions, which are taken care of above. */
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#ifdef __USE_BSD
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#define const __const
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#define signed __signed
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#define volatile __volatile
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#endif
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/* C++ needs to know that types and declarations are C, not C++. */
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#ifdef __cplusplus
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#define __BEGIN_DECLS extern "C" {
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#define __END_DECLS }
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#else
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#define __BEGIN_DECLS
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#define __END_DECLS
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#endif
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/* GCC2 has various useful declarations that can be made with the
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`__attribute__' syntax. All of the ways we use this do fine if
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they are omitted for compilers that don't understand it. */
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#if !defined (__GNUC__) || __GNUC__ < 2
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#define __attribute__(xyz) /* Ignore. */
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#endif
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#endif /* sys/cdefs.h */
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